1
David N Spencer, Michael A Wenham, Paul W White: System, method and apparatus for a modular production tree assembly to reduce weight during transfer of tree to rig. Vetco Gray, Bracewell & Giuliani, April 10, 2012: US08151890 (10 worldwide citation)

A modular tree production tree assembly reduces the weight during transfer of the tree components from a barge to a production rig. The tree assembly includes an upper tree module, a lower tree module, and a choke bridge module. The upper tree module has a tree head, the lower tree module has a guid ...


2

3

4
David N Spencer, Michael A Wenham, Paul W White: System, method and apparatus for a modular production tree assembly to reduce weight during transfer of tree to rig. Vetco Gray, Patent Department, GE Oil & Gas, April 29, 2010: US20100101799-A1

A modular tree production tree assembly reduces the weight during transfer of the tree components from a barge to a production rig. The tree assembly includes an upper tree module, a lower tree module, and a choke bridge module. The upper tree module has a tree head, the lower tree module has a guid ...